That seems more like a values thing than a process thing. I doubt that this process would produce terrible work conditions if Amazon actually cared about their employees well-being.
Bezos does not do the actual work, he facilitates the labour of others. And if he can do that and underpay them more than someone else would then we have a winner.
This is the system.
Strangely, they had to restore capitalist system and then to invite foreign specialists and managers to make the industry even a little bit operational. Turns out, there isn't much you can do with dumb labour alone.
We should tax land not income and stop forcing people to under-sell their labour.
Spare me the "Russia" extreme example. This isn't quantitative, we can dislike that extreme and also the extreme celebrated by the USA which fails so many.